What is a Pulsation Dampener?

What is a Pulsation Dampener?


This equipment plays an important role as an accessory to Yamada air-operated double diaphragm pumps. The pulsation dampener serves to reduce pulsation produced in operation and to assure stable discharge flow and pressure.



When pulsations occur with pump operation, it will result in the pressure in Chamber B being greater than that in Chamber A. The diaphragm will act as an air cushion and automatically adjust to this pressure change and absorb the pulsations.

Yamada Dampener Dia


This operation will shift the center rod position upwards and allow more air in Chamber A through the air inlet, returning the diaphragm to a neutral position. If liquid pressure decreases, air pressure in Chamber A causes the diaphragm to move downward, shifting shaft location and changing valve position, releasing excess air pressure in Chamber A which returns diaphragm to a neutral position. This action causes a reduction in surges and pulsation caused by a air operated double diaphragm pumps


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